Jamb Saws & Undercut Saws for Door Jambs & Flooring Transitions

Getting flooring to slide cleanly under a door jamb or baseboard without a visible gap is one of those details that separates a rushed job from a finished-looking one, and that's the entire reason this category exists. Jamb saws cut a clean, level notch at the exact height your new flooring needs, so the material tucks underneath instead of getting cut around it awkwardly.

Crain is the name most flooring guys already know, their 835 is a heavy-duty powered saw that fully undercuts most doors in place and even handles masonry with the included blade, useful for hearths and other spots a standard wood blade won't touch. They also make a manual undercut saw, a trapezoid-blade hand tool with teeth on both sides for anyone who wants a simpler, no-motor option for occasional use. Roberts covers the powered side too with their Super Six, adjustable from flush cut up to 1-1/16", and it's built to handle more than just jambs, baseboards, toe kicks, and inside corners on molding up to 1/2" thick.

Manual versus powered is really the decision that matters here. A manual saw like Crain's undercut saw is affordable, portable, and needs nothing but your own arm, which makes it a reasonable choice if you're only cutting a handful of jambs on an occasional job. A powered saw like the Crain 835 or Roberts Super Six cuts faster and more consistently, and it handles a wider range of materials without the fatigue of doing it by hand. For a flooring contractor doing this on every install, the powered saw earns its cost back quickly. For a DIYer doing one room, the manual saw is often all that's needed.

Blade choice matters too, a carbide-tipped blade like the one on Crain's 835 holds up to repeated cuts on hardwood and even light masonry, while replacement blades from Crain and Barwalt keep either saw running long after the original blade dulls.

Not sure which saw fits your project? Give us a call, we'll help you figure out what makes sense.